001 /* 002 * Copyright (C) 2010 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 020 package org.crsh.vfs.spi.file; 021 022 import org.crsh.vfs.spi.AbstractFSDriver; 023 024 import java.io.File; 025 import java.io.FileInputStream; 026 import java.io.IOException; 027 import java.io.InputStream; 028 import java.util.Arrays; 029 import java.util.Collections; 030 031 /** 032 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 033 * @version $Revision$ 034 */ 035 public class FileDriver extends AbstractFSDriver<File> { 036 037 /** . */ 038 private final File root; 039 040 /** 041 * Create a new file driver. 042 * 043 * @param root the root 044 * @throws NullPointerException if the root argument is null 045 */ 046 public FileDriver(File root) throws NullPointerException { 047 if (root == null) { 048 throw new NullPointerException(); 049 } 050 051 // 052 this.root = root; 053 } 054 055 public File root() throws IOException { 056 return root; 057 } 058 059 public String name(File handle) throws IOException { 060 return handle.getName(); 061 } 062 063 public boolean isDir(File handle) throws IOException { 064 return handle.isDirectory(); 065 } 066 067 public Iterable<File> children(File handle) throws IOException { 068 File[] files = handle.listFiles(); 069 return files != null ? Arrays.asList(files) : Collections.<File>emptyList(); 070 } 071 072 public long getLastModified(File handle) throws IOException { 073 return handle.lastModified(); 074 } 075 076 public InputStream open(File handle) throws IOException { 077 return new FileInputStream(handle); 078 } 079 }